Double-segment complementary type erbium-doped fiber amplifier

Abstract

The invention discloses a double-segment complementary type erbium-doped fiber amplifier. The double-segment complementary type erbium-doped fiber amplifier comprises an input module, an erbium-doped fiber module, a radiation module and a feedback module, wherein the feedback module comprises a micro-processor and a detection module, the erbium-doped fiber module comprises a first erbium-doped optical fiber and a second erbium-doped optical fiber which are connected in series, the input module is used for sequentially inputting an input laser signal to the first erbium-doped fiber and the second erbium-doped optical fiber and then outputting an amplification signal, the radiation module is used for outputting radiation dosage and radiating the second erbium-doped optical fiber, the detection module is used for detecting whether gain of the amplification signal is flat or not and outputting a control signal to the micro-processor if the gain is not flat, and the micro-processor is used for controlling the radiation dosage output from the radiation module so as to achieve grain flatness of the amplification signal. With the utilization of a radiation effect of the erbium-doped fiber amplifier, the gain characteristic of the erbium-doped optical fibers which are not radiated and the grain characteristic of the erbium-doped optical fibers which are radiated are complementary, and the effect of improving the grain spectrum flatness of the erbium-doped optical fibers is achieved.

Description

technical field [0001] The invention relates to the technical field of erbium-doped optical fiber amplifiers, in particular to an erbium-doped optical fiber amplifier based on a double-segment complementary type. Background technique [0002] The gain control and flattening technology of EDFA is a kind of high-tech developed with the in-depth advancement of optical fiber communication technology in the past ten years, and has become one of the research hotspots of domestic and foreign counterparts. Erbium-doped fiber amplifier (EDFA) is the core functional component in optical communication system, and its rapid development promotes and stimulates the development of wavelength division multiplexing (WDM) transmission system and network. [0003] In WDM systems and networks, when the input optical power changes within a certain range due to factors such as wavelength drop and network configuration changes, the gain and spectral line shape of the EDFA need to be kept stable, w...

AI Technical Summary

Problems solved by technology

The optical performance of erbium-doped fiber amplifiers will decrease after being irradiated by high-energy particles. It is generally believed that high-energy particles can only play a harmful role

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